What was concluded about the rocks closer to the mid-ocean ridge?

What was concluded about the rocks closer to the mid-ocean ridge?

How did scientists discover that rocks farther away from the mid-ocean ridge were older that those near the ridge? Oceanic crust near the mid-ocean ridge is younger than the crust farther from the ridge. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle.

How do you use mid-ocean ridge in a sentence?

mid ocean ridge in a sentence

1. Geography and mid ocean ridges, contributed greatly to the theory of plate tectonics.
2. The triple junctions in the New England region stopped subduction very quickly because the mid ocean ridge was almost parallel to the trench.

What is one fact about the mid-ocean ridge?

The mid-ocean ridge is the most extensive chain of mountains on Earth, stretching nearly 65,000 kilometers (40,390 miles) and with more than 90 percent of the mountain range lying in the deep ocean. The nearly continuous, global mid-ocean ridge system snakes across the Earth’s surface like the seams on a baseball.

Why is the mid-ocean ridge important?

Mid-ocean ridges are geologically important because they occur along the kind of plate boundary where new ocean floor is created as the plates spread apart. Thus the mid-ocean ridge is also known as a “spreading center” or a “divergent plate boundary.” The plates spread apart at rates of 1 cm to 20 cm per year.

Which discovery did scientists make at mid-ocean ridges that caused them to conclude?

Explanation: On the basis of Tharp’s efforts and other new discoveries about the deep-ocean floor, Hess postulated that molten material from Earth’s mantle continuously wells up along the crests of the mid-ocean ridges that wind for nearly 80,000 km (50,000 miles) through all the world’s oceans.

Which discovery did scientists make at mid-ocean ridges that caused them to conclude that new rock was being formed by molten rock?

The specific magnetism of basalt rock is determined by the Earth’s magnetic field when the magma is cooling. Scientists determined that the same process formed the perfectly symmetrical stripes on both side of a mid-ocean ridge.

What are some examples of mid-ocean ridges?

Mid-ocean ridges are typically half a mile to six miles wide and over a mile underwater. Two of the most well-known mid-ocean ridges are the Mid-Atlantic Ridge and the East Pacific Rise. As you might guess, most of the Mid-Atlantic Ridge is in the Atlantic, and most of the East Pacific Rise is in the Pacific.

What is a mid-ocean ridge in your own words?

: an elevated region with a central valley on an ocean floor at the boundary between two diverging tectonic plates where new crust forms from upwelling magma.

How does a mid-ocean ridge form for kids?

The mid-ocean ridge is formed where two tectonic plates meet under the ocean. This divergent boundary creates mountains, valleys like the famous rift valley, volcanoes, and sometimes earthquakes. It stretches all around the Earth, is home to many strange animals, and still has a lot to be explored.

Which statement describes one event that happens at deep ocean trenches?

The destruction of crust occurs at deep-sea trenches. Oceanic rocks are pillow-shaped when formed.

What marine life exists along the mid-ocean ridge?

Over 300 endemic species have been found near the vents, including corals, clams, shrimps, crabs and the now famous giant, red-tipped tubeworms, 4 m tall creatures that flourish in waters close to the hot springs.

Which is an example of a mid ocean ridge?

Here are some examples. The mid-ocean ridge is two chains of mountains separated by a large depression that form at a spreading center. Sitting astride the mid-ocean ridge in the North Atlantic Ocean, Iceland is volcanically one of the most dynamic parts of the Earth’s surface.

Which is better, slow spreading or fast spreading mid ocean ridges?

Fast-spreading mid-ocean ridges, seem to spread with more fluidity and have a smoother look. Slow-spreading and fast-spreading are relative terms. Mid-ocean ridges typically spread less than an inch up to four inches a year. It turns out, global mid-ocean ridges are largest mountain chain on Earth.

How does the mid ocean ridge affect global sealevel?

Increased rates of seafloor spreading (i.e. the rate of expansion of the mid-ocean ridge) has caused global ( eustatic) sealevel to rise over very long timescales (millions of years).

Why are mid ocean ridges not deep canyons?

Because mid-ocean ridges are places where tectonic plates are pulling apart, you might expect to find an incredibly deep canyon, but that’s not exactly the case. As the tectonic plates pull apart, molten rock, or magma, comes up from below to fill in the gaps.